Geophysical analysis of natural caves in iron lithotypes in the region of Mariana, Southeastern Quadrilátero Ferrífero, Brazil

Cardoso, Luiz Henrique; Bacellar, Luís de Almeida Prado; Barbosa, Maria Sílvia Carvalho; Lima, Hernani Mota de

doi:10.1590/0370-44672017710171

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…This was the processed data in terms of the device computation but still appeared in the raw form to be download on the hard drive for analysis by software. The files were in the DATs format which required codes and formatting to open and process (Cardoso et al 2018; Loke 2016). Specialized licensed software was used for handling the high volume of raw information (data) to produce resistivity tomograms.…”

Section: Data and Analysismentioning

confidence: 99%

Groundwater Detection Using Resistivity at Nubutautau Village in Viti Levu in Fiji

Maharaj,

Kumar,

Rollings

et al. 2023

Preprint

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A geophysical technique termed Electrical Resistivity Tomography was applied to identify potential groundwater-bearing zones around Nubutautau village within Viti Levu Island of Fiji. Apparent resistivity data of the subsurface were collected through the electrode assembly along survey lines by injecting current into the subsurface using the ABEM Terrameter LS2. True resistivity data were simulated using the Res2DINVx64 software to produce the final electrical resistivity profiles through an iterative process. Analysis of the resulting modelled profiles revealed the presence of two potential groundwater-bearing zones as potential targets for future drilling. The two targets indicated the presence of potentially saturated vertical fractures through which infiltrating rainwater percolates through the volcanic rock towards a deeper basal aquifer. The identification of the two potential targets demonstrated the great potential of this geophysical technique to effectively inform drilling operations through an evidence-based approach to increase the successful delivery of water security interventions in remote, drought-prone communities of the Pacific.

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Section: Data and Analysismentioning

confidence: 99%

Groundwater Detection Using Resistivity at Nubutautau Village in Viti Levu in Fiji

Maharaj,

Kumar,

Rollings

et al. 2023

Preprint

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show abstract

“…These were the processed data in terms of device computation but still appeared in raw form to be downloaded on the hard drive for analysis by software. The files were in the DATs format, which required codes and formatting to open and process [25,26]. Specialized licensed software was used for handling the high volume of raw information (data) to produce resistivity tomograms.…”

Section: Data and Analysismentioning

confidence: 99%

Groundwater Detection Using Resistivity at Nubutautau Village in Viti Levu in Fiji

Maharaj,

Kumar,

Rollings

et al. 2023

Water

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A geophysical method, electrical resistivity tomography, was applied to identify potential groundwater-bearing zones around Nubutautau village on Viti Levu island, Fiji. Apparent resistivity data of the subsurface were collected through an electrode assembly along survey lines by injecting current into the subsurface using an ABEM Terrameter LS2. The apparent resistivity data were inverted using Res2DINVx64 software to produce the final electrical resistivity through an iterative process to compare the resistivity of layers and draw analogical hydrogeological results. Analysis revealed the presence of two potential groundwater-bearing zones as potential targets for future drilling. The two targets indicated the presence of potentially saturated vertical fractures through which infiltrating rainwater percolates through the volcanic rock towards a deeper basal aquifer. The identification of the two potential targets demonstrated great potential of this geophysical technique to effectively inform drilling operations. A scientific approach can increase the successful delivery of water security interventions in remote, drought-prone communities of the Pacific.

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“…Tem mostrado bons resultados em regiões similares (e.g. CARNEIRO;BARBOSA, 2008;REIS et al, 2012;CARDOSO et al, 2018).…”

Section: Introductionunclassified

Integração de análise hidroquímica à geofísica aérea para entendimento da hidrodinâmica no entorno da Lagoa da Confusão, Tocantins, Brasil

Morais,

Silva Sousa,

Almeida Prado Bacellar

et al. 2024

REGNE

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Geofísica aérea regional, isótopos estáveis e análises de dados hidroquímicos foram utilizados para o entendimento da dinâmica dos fluxos hídricos e conhecimento das características das águas superficiais e subterrâneas do entorno da Lagoa da Confusão – Estado do Tocantins, Brasil, com o objetivo de contribuir para uma melhor gestão dos recursos hídricos da área pressuposta como um carste encoberto e subsidiar ações de proteção ao meio ambiente. Dados geofísicos aéreos, evidenciaram três tipologias: rochas carbonáticas, rochas metassedimentares diversas e lateritas. Foram identificados inúmeros lineamentos paralelos, incluindo falhas de grande extensão, nas direções preferenciais N-S e E-W e, subordinadamente, 45ºNE e 45ºNW, que mostram forte controle na rede de drenagem superficial. Interpreta-se que a Lagoa da Confusão está assentada sobre substrato carbonático. As análises isotópicas e hidroquímicas indicam a ocorrência do processo de carstificação na área de estudo, na qual a composição química e isotópica da água é alterada pela interação água-rocha e dissolução das rochas carbonáticas, o que é ainda evidenciado pela ocorrência de cavernas e dolinas (ipucas).

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Geophysical analysis of natural caves in iron lithotypes in the region of Mariana, Southeastern Quadrilátero Ferrífero, Brazil

Cited by 3 publications

References 5 publications

Groundwater Detection Using Resistivity at Nubutautau Village in Viti Levu in Fiji

Groundwater Detection Using Resistivity at Nubutautau Village in Viti Levu in Fiji

Groundwater Detection Using Resistivity at Nubutautau Village in Viti Levu in Fiji

Integração de análise hidroquímica à geofísica aérea para entendimento da hidrodinâmica no entorno da Lagoa da Confusão, Tocantins, Brasil

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